U.S. Costa Rica Workshop on the Effects on Soils and Structures of the 1990 and 1991 Costa Rican Earthquakes

该项目将组织、召开一次关于1991年4月22日哥斯达黎加地震影响的讲习班并就此提出报告。这次地震提供了一个独特的机会来研究位于非常柔软和可液化的土壤上的结构的性能。讲习班旨在研究和确定分析、改造和设计技术，以减轻土壤条件差时的损害。它的重点是确定需要更多研究的领域，并为现有结构提出切实可行的解决办法，重点是生命线(桥梁、水和电力系统、应急服务和主要工业设施)。该结果将直接适用于美国的实践，因为美国的大部分地区，包括旧金山湾区，密西西比河流域，东海岸的几个地震区如果受到强烈的地面震动，也可能容易出现类似的问题。

The project will organize, convene and report on a workshop on the effects of the April 22, 1991 Costa Rica earthquake. This earthquake presents an unique opportunity to study the performance of structures sited on very soft and liquefiable soils. The workshop intends to study and identify analysis, retrofit, and design techniques to mitigate damage when poor soil conditions exist. It focuses on identifying areas where more research is needed and on recommending practical solutions for existing structures, with emphasis on lifelines (bridges, water and electrical systems, emergency services, and key industrial facilities). The results will be directly applicable to the U.S. practice since large areas of the U.S., including the San Francisco Bay Area, the Mississippi River Valley, and several East Coast seismic regions are potentially vulnerable to similar problems if subjected to strong ground shaking.